Burring tool



April 19, 1 38- J. T. KILBRIDE ET AL BURRING TOOL Filed Feb. 28, 1936 INVENTOR5 M ATTORNEYS.

Patented Apr. 19, 1938 UNITED STATES PATENT OFF-ICE BURRING TOOL John T. Kilbride, Stratford, and Edward W. Carpenter, Fairfield, Conn, assignors to The E. W. Carpenter Manufacturing Company, Bridgeport, Conn, a corporation of Connecticut Application February 28, 1936, Serial No. 66,224

.6 Claims. (Cl. 90-124) This invention relates to new and useful imstraps 42 and 13 may be-formed from heavy sheet provements in tools and has particular relation metal. to a burring tool. The front end strap 12 includes a portion 15 An object of the invention is to provide a tool arranged at an obtuse angle to the handle, and adapted for rapidly removing burrs and the sharp due to the incline the outer or free end of strap 5 corners at the edges of plates or other pieces irportion I5 is disposed in advance of the front end respective of whether they have straight, curved of the handle. A cutter unit generally desigor irregular edges. nated I6 is secured to the inclined strap portion Another object is to provide a tool as specified 5- Such un t Co p s s a frame including and which is easy to operate, of light Weight, of spaced walls I! and I8 and a flat tongue-like ex- .10 simple and durable construction and which intension l9 carried by one of said walls. This cludes means protecting the hand of the operator frame may be stamped and shaped from 'heavy from injury while using the tool. sheet metal. Passing through and mounted by Other objects and advantages will become apthe walls I! and I8 are a pair of pins or rivets parent from a consideration of the following deeach, between the walls, mounting hardened tailed description taken in connection with the discs 2! and spacers or separators '22. The araccompanying drawing wherein a satisfactory rangement is such that the discs on one pin overembodiment of the invention is shown. Howlap those on the other thereof, and while two ever, it is to be understood that the invention is discs are shown on each pin it will be clear that 20 not limited to the details disclosed but includes the number may be varied-and fixed cutters may 20 all such variations and modifications as fall withbe used instead of the discs if preferred.

in the spirit of the invention and the scope of the A portion of the frame of the cutter unit is appended claims. cut away providing an opening 23 with relation In the drawing: to which-the discs are so disposed as tohave por- 5 Fig. l is a side elevational view of the tool show- -tions exposed through said opening for use from ing the same positioned for the burring of the both sides of the frame. Frame extension I9 is edge of a plate; provided with a pair of keyhole openings 24 (see Fig. 2 is a bottom plan view of the tool; Fig. 5) and in correspondingly spaced relation a 3 is a transverse sectional view taken subpair of lugs 25 are provided on the rear or understantially along the line 33 of Fig. 1 side of the inclined strap portion t5, and screws em Fig. 4 is a top plan view-of a "cutter unit emor'headed studs 26 passing through the said-strap ployed; and portion are threaded into said lugs. The en- 'Fig. 5 is a front elevational view of the cutter larged portion of the keyhole openings 24 are unit. sufliciently 'largeto pass the heads of screws 26 Referring in detail to the drawing the present while the smaller portions 2 F are insufiicient to .35 burring tool comprises an elongated handle or pass said head and are adapted to receive .the grip l0 shown as a transversely circular piece of shanks of the screws. wood ta ered toward its respective ends. How- Th utte un t s s u to the st p p rt ever, it is to be understood that the handle may by disposing the extension l9 against s be of other material as found most convenient. Strap portion with the Smaller ends of the 40 A transversely arcuate guard H is secured to the keyhole Openings 24 unflier the heads of the ends of the handle by means of end Straps l2 and screws 25 and then tightenmgsuch screws. When l3 Shown as integral with the guard, and these using the tool to remove a burr and bevel the 4 straps secure the guard in a position extending l of exampl? the plate 21 of Fig. 1, the handle 1s held to dispose the cutters longitudlnally of but spaced from the handle so one at each side of the edge of the plate In that when the handle 15 bemg gnpped as when effect the cutters straddle the edge of the plate use, the fingers of the operator are protected by one cutter 2| being disposed at each of its sides. the guard, the guard preventing the operator 5 This disposes the edge of the plate in the notch hand Coming In Contact 71th the metal which is 28 formed where the cutters begin to overlap and so being burred or sharp edges being removed. Any then as the cutters are drawn along t edge f suitable means as for example the screws i4 may th plate by manipulation of the h ndl [0 th be used to secure the end straps i2 and E3 to the tter scrape or cut the burrs from the plate, handle in and it is noted that the guard extends and may also bevel its edges if desired.

laterally beyond the handle. The guard with the The cutters are inclined with respect to the 55 handle and therefore if the handle is held parallel to the edge of the plate or other piece and drawn along a shearing cut is obtained. Toward the rear end strap l3 a portion 29 is lanoed and pressed from the guard. Such portion has its outer end in inverted V-shape or notched, and the portion is arranged at an incline and comprises a guide adapted to straddle the edge being trimmed as shown in Figs. 1 and 3.

It will be clear that on loosening the screws 26 the cutter unit may be removed from the device since the large portions of the keyhole openings 24 are of a diameter to pass over the heads of the screws 26. Therefore when a cutter unit has been dulled to the point where it is no longer of value it may be removed and a new unit substituted for it. Attention is also called to the fact that a unit may be applied with either the wall I! or the wall I8 as its forward wall, and it will therefore be understood that when one set of edges of cutters or discs 2| become dulled the unit may be removed from the device and applied in reversed position presenting the other edges of the cutters for use.

The present tool is particularly adapted for removing the burrs from and beveling the edges of metal plates, although it is also useful for removing the sharp edges of molded plastic pieces, such for example as bakelite and the like, or of wood or any other material that can be worked on with a file. The tool may be used on small or large pieces of work and irrespective of whether or not the edges being cleaned are irregular, straight or curved. With the present tool the edges of pieces may be rapidly cleared of burrs and the sharp edges of the pieces may also be rapidly removed thus doing away with the slow operation of filing. The guard l I will protect the hand of the user from injury by coming in contact With the work.

Having thus set forth the nature of our invention, what we claim is:

l. A tool for removing burrs from the edges of member comprising an elongated handle, a sheet metal guard spaced from and extending longitudinally of the handle at one side thereof, laterally extending straps at the ends of the guard for securing it to the handle, a cutter located at one end of the guard at the opposite side of the guard from the handle in position to be drawn over an edge, and an integral lug cut from and bent outwardly from the guard adjacent its other end to engage the edge to form a guide, the end of the lug being notched to straddle said edge.

2. A tool for removing burrs from a sharp metal edge comprising an elongated handle, a guard comprising an integral piece of sheet metal having a body portion extending at one side of and spaced from the handle to form a hand guard between the handle and the edge being operated upon, said guard including straps at the ends of the body secured to the handle to mount the guard thereon, a cutter unit including a cutter means adapted when drawn over a metal edge to remove the burrs therefrom, and means for securing the cutter unit to one of the end straps including a headed stud on the strap and an extension on the cutter unit having a keyhole opening to receive said stud to detachably secure the unit to the guard, and said cutter means extending from the opposite side of the guard to that of said handle.

3. A tool for removing burrs from the edges of a member comprising an elongated handle, a hand guard spaced from and extending longitudinally of the handle at one side thereof so as to be between the handle and the edge being operated upon, end straps connecting the guard to the handle, a cutter secured to the guard in position to be drawn over the edge, and a guide on the guard spaced from the cutter and having a notched edge to straddle the edge being operated upon.

4. A tool for removing burrs from the edges of a member comprising an elongated handle, a guard extending longitudinally at one side of and spaced from the handle to form a hand guard between the handle and the edge being operated upon, a cutter means extending beyond the guard at the opposite side of the guard from the handle in position to be drawn over an edge, and a guide on the same side of the guard with the cutter located in alignment with and spaced from the cutter means and having a notched edge to straddle the edge being operated upon and guide the cutter means along said edge.

5. A tool for removing burrs from the edges of a member comprising an elongated handle, a

sheet metal guard spaced from and extending longitudinally of the handle at one side thereof to form a hand guard between the handle and the edge being operated upon, a cutter unit comprising a frame including spaced walls and an extension, cutters comprising discs mounted between said walls with their edges in overlapping relation and partially exposed for use, means connecting said frame extension with the handle whereby the handle may be used to draw the cutters along the edge to be operated upon, and said means including means to removably secure the frame to the handle with either Wall foremost so that the position of the unit may be reversed to use either side of the cutters.

6. A tool for removing burrs from the edges of a member comprising an elongated handle, a

sheet metal guard spaced from and extending JOHN T. KILBRIDE. EDWARD W. CARPENTER. 

